There is a discussion about folding on one of these type of beasts on the internet. This platform is not as efficient as skt 2011 for scaling across all the cores. The conclusion was that it is not worth the expense, a guy called -alias- was shopping for a new rig ! He is the real deal and the only person I know folding on a quad socket 2011 system that produces 650k ppd and thats just one of many big rigs. Actually the discussion was about the purchase of an 8 cpu system, here it is - http://hardforum.com/showthread.php?t=1716471

Quad cpus isn't enough for these guys - apparently an 8 x xeon system was tested at 995k ppd using the fastest cpus available. The 1 mil mark hasn't been breached yet to my knowledge !